I am guessing you have just started gardening. No, once you have set the soil plots, they remain until you dig them up. There is a specific spell for plowing up dead plants and your plots that has the icon of a Shovel, so be sure you only use it for getting rid of the plots or dead plants you no longer want.

Soil plots stay until you remove them. It cost 1 energy to remove a soil plot. I have many abandoned gardens in various houses just because I am too darn lazy to remove them. One of these days I will plow them over.

I am guessing you have just started gardening. No, once you have set the soil plots, they remain until you dig them up. There is a specific spell for plowing up dead plants and your plots that has the icon of a Shovel, so be sure you only use it for getting rid of the plots or dead plants you no longer want.

Actually I am a grandmaster gardener and have difficulty remembering if it disappears.

Reason why I asked is I found out a way to farm 200 mega snacks a week. But it takes about 10 energy elixirs to set up and 4 energy elixir to replant my plants. I prefer planting things at the same time and not over several days.